Download MMA FINAL STUDY GUIDE 2026 CORRECT SOLUTIONS GRADED A+ and more Exams Mechanics of Materials in PDF only on Docsity!
MMA FINAL STUDY GUIDE 2026 CORRECT
SOLUTIONS GRADED A+
โ What are the five influencing factors of engineering and casualty control. Answer: - Personnel organization and training
- Sound design
- Maintenance inspections
- Communications โ True or false: MCRP can be used as a study guide for increasing watch stander knowledge. Answer: True โ EOCC Deviations must be authorized in writing by the. Answer: Commanding officer โ What is an example of sound design. Answer: Propulsion plant โ EOCC training is typically conducted using what methods. Answer: CRP- walkthrough CRP- talkthrough EOCC- exercises โ Which training team conducts EOCC drills and has ultimate authority for the engineer in plant well casualty control exercises are being performed. Answer: ETT
โ What are the four actions of the EOCC. Answer: Immediate, supplementary, controlled, symptoms/ indications โ Which EEOC see actions must be memorized. Answer: Immediate and controlling โ Which EOCC action details the sequential steps to be taken to stabilize an abnormal situation and prevent an actual casualty. Answer: Immediate actions โ Who uses the casualty response procedures (CPR). Answer: Each specific watch Station โ Who can grant permission to restore from a casualty. Answer: Engineer officer โ What does the MCPR stand for. Answer: Master casualty response procedures โ What does split Plant mean. Answer: Allow for alternate sources for supplying vital services โ What is an example of a loop system. Answer: Fire main
โ What must be done before inflating in emergency shaft seal. Answer: Stopped and locked โ Line shaft bearings _____ and_____ The propulsion shafting in alignment. Answer: Align and support โ Where is the Stern tube located. Answer: Stern shaft โ What are the two types of shaft seals. Answer: Rubber lip and mechanical โ What is used to maintain watertight integrity if the primary shaft seal fails. Answer: Rubber shaft seal โ What can be used to inflate the emergency shaft seal. Answer: Nitrogen, oxygen, LP air โ The purpose of the glans seal system is to ____ A steam seal at the turbine casing to ____ Air leakage into the casing at low steaming right and steam leakage out during high steaming rate. Answer: Provide; prevent โ Air leakage into the casing of the main proportion turbine can cause the main condenser to. Answer: Lose vacuum
โ The purpose of the gland exhaust fan is to move _____ and _____ From the gland exhaust condenser. Answer: Air and non condensing โ What is the purpose of the gland exhaust condenser. Answer: Receives exhausting steam air from turbine gland exhaust cavities through leak off โ Glenn seal regulating station reduces 150 psiG superheated steam to between ____ to ____ PsiG for sealing the shaft glands of the main propulsion turbine. Answer: 1/2 to 2 โ Gland seal steam on loading station function is to ______ Excess Glenn ceiling steam to the main condenser. Answer: Dump โ What is the function of the Gland seal supply cavity. Answer: Allows Gland sealing steam to enter turbine gland โ Where does the gland exhaust fan discharge to. Answer: The atmosphere โ What valve gives an audible signal in the event of unloading valve failure. Answer: Sentinel valve โ What relieves excessive pressure in the gland seal system. Answer: Relief valve
โ How is condensation in the fresh water drain collecting tank (FWDCT) Returned to the basic steam cycle. Answer: Vacuum drag to the condenser or dumped into DFT โ Which valve automatically controls boiler water level. Answer: Automatic feed water control valve โ Which two valves control DFT water level?. Answer: Make up and excess โ Auxiliary exhaust system pressure exerts. Answer: 15 psi โ Gland seal steam system pressure exerts. Answer: .5-2 psi โ Deaerating feed tank pressure exerts. Answer: 15 psi โ How many Minutes to secure from white smoke. Answer: One minute โ In-line desuperheater cooling medium. Answer: Feed water โ Shell pressure relief valve exerts. Answer: 30 PSI โ Normal operating boil water level is normally. Answer: +/- 1
โ Auxiliary exhaust system temperature. Answer: 300 to 450ยฐF โ Main feed pump discharge pressure. Answer: 150 to 200 psi above boiler operating psi โ Economizer preheating temperature. Answer: 100 to 200ยฐF โ Fuel oil strainer shifting pressure. Answer: 10 PSID โ Deaerating feed tank temperature. Answer: 250ยฐF โ After condenser vacuum pressure. Answer: 14. โ Minimum and maximum boiler water level. Answer: +7/- 6 โ 600/14 augmenter opening pressure. Answer: 14 psi โ Minimum/maximum DFT temperature difference. Answer: +/-3ยฐF โ Steam system created by desuperheater. Answer: 600 aux โ Vacuum breaker lifting vacuum. Answer: 4" H2o โ MN/AUX Cond Unloading valve opening psi. Answer: 16 PSI
โ What preheats incoming feed water 100 to 200ยฐF. Answer: Economizer โ What is the purpose of the safety shut off device (SSD). Answer: Overpressurized atomizer โ What is the purpose of the main feed booster pump. Answer: Pumps feed water from DFT to MFP at NDSH and to prevent cavitation โ What is the purpose of the main feed pump. Answer: Send feed water to economizer โ Why do we get heavy black smoke. Answer: Too much fuel โ Why do we get white smoke. Answer: Too much air or oxygen โ What would you use to secure all fuel flowing to an applicable boiler. Answer: Fuel oil quick closing valve FOQCV โ What would you use to secure one or two burners. Answer: SSD โ What is a furnace purge. Answer: It rids firebox uptakes of explosive vapors
โ What type of atomization are you going to use if you are the first boiler to light off. Answer: Air โ What type of Atomization are you going to use After you light off. Answer: Steam โ What energy conversion takes place in the generation phase of the basic steam cycle. Answer: Chemical into thermal โ The three type of blow downs. Answer: Surface, bottom, continuous โ Which blow down cannot be done while the boiler is online. Answer: Bottom โ What does EOSS stand for?. Answer: Engineering operational sequencing system โ What does EOP stand for. Answer: Engineering operating procedures โ What does EOCC stand for. Answer: Engineering operational casualty control
โ What is the purpose of the main engine guarding valve. Answer: Secure steam to HP and LP โ Where does auxiliary exhaust come from. Answer: Non- condensing โ Where does 150 psi desuperheated steam go to. Answer: Back to the boiler โ What boiler to bring feed water from the steam drum down to the water room and lower headers. Answer: Down comers โ What is used removes it from boiler tubes. Answer: Scoot blower โ What energy conversion takes place in the expansion phase. Answer: Thermal to mechanical โ How do you operate boiler safety valves manually. Answer: The hand easing gear โ What are the six classifications of a turbine. Answer: Construction Staging and arrangement Direction Division Repetition
Type of exhaust โ What type of steam flow is radio, axle and helical turbine. Answer: Direction, perpendicular, parallel/tangent โ What is another name for a turbine blade. Answer: Steam bucket โ Which drain system operates above 150 psi and goes to the DFT. Answer: HP Drain system โ Which drain system is located inside of the machine room and operates below 150 psi. Answer: Fresh water drain โ Which drain system is located outside of the machinery room and operates below 150 psi. Answer: LP drain system โ What is used to augment the auxiliary exhaust system. Answer: 600 psi 14 psi aug station โ What is the purpose of an expansion piping loop. Answer: Provide flexibility โ What limits the speed of a main feed pump. Answer: Speed limiting governor
โ Determining Idle boiler lay up depends on what considerations. Answer: Maintenance lay up โ What are the two categories of idle boiler lay up. Answer: Wet and dry โ What are the two methods of dry lay up. Answer: Desiccant and heat air โ What do you fix blades do. Answer: Redirect steam flows from one row of moving blades โ What do moving blades do. Answer: Convert kinetic energy of steam to mechanical energy โ The ______ augmenting station is used to augment auxiliary exhaust. Answer: 600/ โ What allows for the controlled warm up of down stream piping and equalization across valves. Answer: Bypass valve โ True or false In the helical flow turbines, steamers directed into the steam buckets, into a reversing chamber and then back into the steam buckets. Answer: True
โ Which set of boiler tubes does not have water in it or around it. Answer: Superheater โ What component use is 600 psi auxiliary steam and provide combustion air for the boiler. Answer: Force draft blower โ What kind of Contacts Heat exchanger is the in-line desuperheater. Answer: Direct โ Which valve provide the means to isolate the 600 psi auxiliary steam system from the boiler. Answer: Auxiliary steam stop valve โ What are the three types of tail pipes in a fuel oil service tank. Answer: Service system, transfer, stripping โ What is the purpose of the vent pipe on the fuel oil tank. Answer: Permit air to escape and allow air to enter or exit โ What are the two functions of the sounding tube on a fuel oil tank. Answer: To take samples and to determine liquid level โ What are the two types of sight glass used on fuel oil tanks. Answer: Direct and indirect โ What is the purpose of the fuel oil strainer. Answer: To remove solid particles from fuel through smaller openings
โ An auxiliary condenser is a _____ pass heat exchanger. Answer: 2 โ Two ways salt water gets into the main condenser is. Answer: Circulating and scoop inflation โ What prevents backflow of salt water in the main condenser. Answer: Non-return line โ What type of pump is the main circulating pump. Answer: Propeller โ The main condenser overboard temperature should be approximately ____ Higher than the injection temperature. Answer: 10 โ The inter-condenser is under a vacuum of ____ HG. Answer: 26 โ What is the temperature of condensate prior to entering the DFT. Answer: 140-160ยฐF โ What are the two circuits in the main condenser. Answer: Cooling water and vapor condensate โ What prevents the main condenser in the inter-condenser from equalizing and vacuum. Answer: U Shaped look
โ How is condensating the freshwater and collecting tank return to the basic steam cycle. Answer: The fresh water drain or collecting tank pump โ Where does the fee phase of the basic steam cycle begin. Answer: Lower half of DFT โ What is the purpose of aux exhaust and HP drains in the DFT. Answer: Heat source for DFT โ What is the process of removing dissolved oxygen from the condensate in the DFT called. Answer: Deaeration โ What in the DFT prevent rapid changes in water level caused by the rolling motion of the ship. Answer: Swash plates โ What prevents the swirling motion of the water entering the suction pipe of the DFT. Answer: Anti-vortex baffle โ What is the purpose of the spray nozzles in the DFT. Answer: To cover more area and expand โ What is the maximum temperature differential between the upper and lower halves of the DFT. Answer: 250ยฐF +/-3F
